<template>
  <div class="app-container">
    <div class="filter-container">
      <el-input
        v-model="listQuery.title"
        placeholder="Title"
        style="width: 200px"
        class="filter-item"
        @keyup.enter="handleFilter"
      />
      <el-select
        v-model="listQuery.importance"
        placeholder="Imp"
        clearable
        style="width: 90px"
        class="filter-item"
      >
        <el-option
          v-for="item in importanceOptions"
          :key="item"
          :label="item"
          :value="item"
        />
      </el-select>
      <el-select
        v-model="listQuery.type"
        placeholder="Type"
        clearable
        class="filter-item"
        style="width: 130px"
      >
        <el-option
          v-for="item in calendarTypeOptions"
          :key="item.key"
          :label="item.display_name + '(' + item.key + ')'"
          :value="item.key"
        />
      </el-select>
      <el-select
        v-model="listQuery.sort"
        style="width: 140px"
        class="filter-item"
        @change="handleFilter"
      >
        <el-option
          v-for="item in sortOptions"
          :key="item.key"
          :label="item.label"
          :value="item.key"
        />
      </el-select>
      <el-button
        v-waves
        class="filter-item"
        type="primary"
        icon="el-icon-search"
        @click="handleFilter"
      >
        Search
      </el-button>
      <el-button
        class="filter-item"
        style="margin-left: 10px"
        type="primary"
        icon="el-icon-edit"
        @click="handleCreate"
      >
        Add
      </el-button>
      <el-button
        v-waves
        :loading="downloadLoading"
        class="filter-item"
        type="primary"
        icon="el-icon-download"
        @click="handleDownload"
      >
        Export
      </el-button>
      <el-checkbox
        v-model="showReviewer"
        class="filter-item"
        style="margin-left: 15px"
        @change="tableKey = tableKey + 1"
      >
        reviewer
      </el-checkbox>
    </div>

    <el-table
      :key="tableKey"
      v-loading="listLoading"
      :data="list"
      border
      fit
      highlight-current-row
      style="width: 100%"
      @sort-change="sortChange"
    >
      <el-table-column
        label="ID"
        prop="id"
        sortable="custom"
        align="center"
        width="80"
        :class-name="getSortClass('id')"
      >
        <template #default="{ row }">
          <span>{{ row.id }}</span>
        </template>
      </el-table-column>
      <el-table-column label="Date" width="150px" align="center">
        <template #default="{ row }">
          <span>{{ toParseTime(row.timestamp, "{y}-{m}-{d} {h}:{i}") }}</span>
        </template>
      </el-table-column>
      <el-table-column label="Title" min-width="150px">
        <template #default="{ row }">
          <span class="link-type" @click="handleUpdate(row)">{{
            row.title
          }}</span>
          <el-tag>{{ toTypeFilter(row.type) }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column label="Author" width="110px" align="center">
        <template #default="{ row }">
          <span>{{ row.author }}</span>
        </template>
      </el-table-column>
      <el-table-column
        v-if="showReviewer"
        label="Reviewer"
        width="110px"
        align="center"
      >
        <template #default="{ row }">
          <span style="color: red">{{ row.reviewer }}</span>
        </template>
      </el-table-column>
      <el-table-column label="Imp" width="80px">
        <template #default="{ row }">
          <svg-icon
            v-for="n in +row.importance"
            :key="n"
            icon-class="star"
            class="meta-item__icon"
          />
        </template>
      </el-table-column>
      <el-table-column label="Readings" align="center" width="95">
        <template #default="{ row }">
          <span
            v-if="row.pageviews"
            class="link-type"
            @click="handleFetchPv(row.pageviews)"
          >{{ row.pageviews }}</span>
          <span v-else>0</span>
        </template>
      </el-table-column>
      <el-table-column label="Status" class-name="status-col" width="100">
        <template #default="{ row }">
          <el-tag :type="toStatusFilter(row.status)">
            {{ row.status }}
          </el-tag>
        </template>
      </el-table-column>
      <el-table-column
        label="Actions"
        align="center"
        width="230"
        class-name="small-padding fixed-width"
      >
        <template #default="{ row, $index }">
          <el-button type="primary" size="mini" @click="handleUpdate(row)">
            Edit
          </el-button>
          <el-button
            v-if="row.status != 'published'"
            size="mini"
            type="success"
            @click="handleModifyStatus(row, 'published')"
          >
            Publish
          </el-button>
          <el-button
            v-if="row.status != 'draft'"
            size="mini"
            @click="handleModifyStatus(row, 'draft')"
          >
            Draft
          </el-button>
          <el-button
            v-if="row.status != 'deleted'"
            size="mini"
            type="danger"
            @click="handleDelete(row, $index)"
          >
            Delete
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total > 0"
      :total="total"
      :page="listQuery.page"
      :limit="listQuery.limit"
      @pagination="getList"
    />

    <el-dialog :title="textMap[dialogStatus]" :visible="dialogFormVisible">
      <el-form
        ref="dataForm"
        :rules="rules"
        :model="temp"
        label-position="left"
        label-width="70px"
        style="width: 400px; margin-left: 50px"
      >
        <el-form-item label="Type" prop="type">
          <el-select
            v-model="temp.type"
            class="filter-item"
            placeholder="Please select"
          >
            <el-option
              v-for="item in calendarTypeOptions"
              :key="item.key"
              :label="item.display_name"
              :value="item.key"
            />
          </el-select>
        </el-form-item>
        <el-form-item label="Date" prop="timestamp">
          <el-date-picker
            v-model="temp.timestamp"
            type="datetime"
            placeholder="Please pick a date"
          />
        </el-form-item>
        <el-form-item label="Title" prop="title">
          <el-input v-model="temp.title" />
        </el-form-item>
        <el-form-item label="Status">
          <el-select
            v-model="temp.status"
            class="filter-item"
            placeholder="Please select"
          >
            <el-option
              v-for="item in statusOptions"
              :key="item"
              :label="item"
              :value="item"
            />
          </el-select>
        </el-form-item>
        <el-form-item label="Imp">
          <el-rate
            v-model="temp.importance"
            :colors="['#99A9BF', '#F7BA2A', '#FF9900']"
            :max="3"
            style="margin-top: 8px"
          />
        </el-form-item>
        <el-form-item label="Remark">
          <el-input
            v-model="temp.remark"
            :autosize="{ minRows: 2, maxRows: 4 }"
            type="textarea"
            placeholder="Please input"
          />
        </el-form-item>
      </el-form>
      <template #footer>
        <div class="dialog-footer">
          <el-button @click="dialogFormVisible = false"> Cancel </el-button>
          <el-button
            type="primary"
            @click="dialogStatus === 'create' ? createData() : updateData()"
          >
            Confirm
          </el-button>
        </div>
      </template>
    </el-dialog>

    <el-dialog :visible="dialogPvVisible" title="Reading statistics">
      <el-table
        :data="pvData"
        border
        fit
        highlight-current-row
        style="width: 100%"
      >
        <el-table-column prop="key" label="Channel" />
        <el-table-column prop="pv" label="Pv" />
      </el-table>
      <template #footer>
        <span class="dialog-footer">
          <el-button
            type="primary"
            @click="dialogPvVisible = false"
          >Confirm</el-button>
        </span>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import {
  fetchList,
  fetchPv,
  createArticle,
  updateArticle
} from '@/api/article'
import waves from '@/directive/waves' // waves directive
import { parseTime, statusFilter, typeFilter } from '@/utils'
import Pagination from '@/components/Pagination' // secondary package based on el-pagination

export default {
  name: 'ComplexTable',
  components: { Pagination },
  directives: { waves },
  data() {
    return {
      tableKey: 0,
      list: null,
      total: 0,
      listLoading: true,
      listQuery: {
        page: 1,
        limit: 20,
        importance: undefined,
        title: undefined,
        type: undefined,
        sort: '+id'
      },
      importanceOptions: [1, 2, 3],
      calendarTypeOptions: [],
      sortOptions: [
        { label: 'ID Ascending', key: '+id' },
        { label: 'ID Descending', key: '-id' }
      ],
      statusOptions: ['published', 'draft', 'deleted'],
      showReviewer: false,
      temp: {
        id: undefined,
        importance: 1,
        remark: '',
        timestamp: new Date(),
        title: '',
        type: '',
        status: 'published'
      },
      dialogFormVisible: false,
      dialogStatus: '',
      textMap: {
        update: 'Edit',
        create: 'Create'
      },
      dialogPvVisible: false,
      pvData: [],
      rules: {
        type: [
          { required: true, message: 'type is required', trigger: 'change' }
        ],
        timestamp: [
          {
            type: 'date',
            required: true,
            message: 'timestamp is required',
            trigger: 'change'
          }
        ],
        title: [
          { required: true, message: 'title is required', trigger: 'blur' }
        ]
      },
      downloadLoading: false
    }
  },
  created() {
    this.getList()
  },
  methods: {
    toParseTime(val1, val2) {
      return parseTime(val1, val2)
    },
    toStatusFilter(val) {
      return statusFilter(val)
    },
    toTypeFilter(val) {
      return typeFilter(val)
    },
    getList() {
      this.listLoading = true
      fetchList(this.listQuery).then((response) => {
        this.list = response.data.items
        this.total = response.data.total

        // Just to simulate the time of the request
        setTimeout(() => {
          this.listLoading = false
        }, 1.5 * 1000)
      })
    },
    handleFilter() {
      this.listQuery.page = 1
      this.getList()
    },
    handleModifyStatus(row, status) {
      this.$message({
        message: '操作Success',
        type: 'success'
      })
      row.status = status
    },
    sortChange(data) {
      const { prop, order } = data
      if (prop === 'id') {
        this.sortByID(order)
      }
    },
    sortByID(order) {
      if (order === 'ascending') {
        this.listQuery.sort = '+id'
      } else {
        this.listQuery.sort = '-id'
      }
      this.handleFilter()
    },
    resetTemp() {
      this.temp = {
        id: undefined,
        importance: 1,
        remark: '',
        timestamp: new Date(),
        title: '',
        status: 'published',
        type: ''
      }
    },
    handleCreate() {
      this.resetTemp()
      this.dialogStatus = 'create'
      this.dialogFormVisible = true
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate()
      })
    },
    createData() {
      this.$refs['dataForm'].validate((valid) => {
        if (valid) {
          this.temp.id = parseInt(Math.random() * 100) + 1024 // mock a id
          this.temp.author = 'vue-element-admin'
          createArticle(this.temp).then(() => {
            this.list.unshift(this.temp)
            this.dialogFormVisible = false
            this.$notify({
              title: 'Success',
              message: 'Created Successfully',
              type: 'success',
              duration: 2000
            })
          })
        }
      })
    },
    handleUpdate(row) {
      this.temp = Object.assign({}, row) // copy obj
      this.temp.timestamp = new Date(this.temp.timestamp)
      this.dialogStatus = 'update'
      this.dialogFormVisible = true
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate()
      })
    },
    updateData() {
      this.$refs['dataForm'].validate((valid) => {
        if (valid) {
          const tempData = Object.assign({}, this.temp)
          tempData.timestamp = +new Date(tempData.timestamp) // change Thu Nov 30 2017 16:41:05 GMT+0800 (CST) to 1512031311464
          updateArticle(tempData).then(() => {
            const index = this.list.findIndex((v) => v.id === this.temp.id)
            this.list.splice(index, 1, this.temp)
            this.dialogFormVisible = false
            this.$notify({
              title: 'Success',
              message: 'Update Successfully',
              type: 'success',
              duration: 2000
            })
          })
        }
      })
    },
    handleDelete(row, index) {
      this.$notify({
        title: 'Success',
        message: 'Delete Successfully',
        type: 'success',
        duration: 2000
      })
      this.list.splice(index, 1)
    },
    handleFetchPv(pv) {
      fetchPv(pv).then((response) => {
        this.pvData = response.data.pvData
        this.dialogPvVisible = true
      })
    },
    handleDownload() {
      this.downloadLoading = true
      import('@/vendor/Export2Excel').then((excel) => {
        const tHeader = ['timestamp', 'title', 'type', 'importance', 'status']
        const filterVal = [
          'timestamp',
          'title',
          'type',
          'importance',
          'status'
        ]
        const data = this.formatJson(filterVal)
        excel.export_json_to_excel({
          header: tHeader,
          data,
          filename: 'table-list'
        })
        this.downloadLoading = false
      })
    },
    formatJson(filterVal) {
      return this.list.map((v) =>
        filterVal.map((j) => {
          if (j === 'timestamp') {
            return parseTime(v[j])
          } else {
            return v[j]
          }
        })
      )
    },
    getSortClass: function(key) {
      const sort = this.listQuery.sort
      return sort === `+${key}` ? 'ascending' : 'descending'
    }
  }
}
</script>
